Dish-washing machine.



No. 704,494. Patented July 15, I902.

C. W. ARNOT.

DISH WASHING MACHINE. [Application filed Apr. 20, 1901. Renewed May 23, 1902.) -(No Model.) 2 SheetsSheet I.

WITNESSES.

. Patented July l5, I902. C. W. ARNOT. DISH WASHING MACHINE. (Application filed Apr. 20, 1901. iteuewed May 23, 1902.)

2 Sheetsr-SMM 2.

(No Model.)

INVENTOR.

n News PEYEPS ca. mom-mum. WASNINGION. 1;;v c,

U TTED STATES PATENT OFFICE.

OEPHAS W. ARNOT, OF YPSILANTI, MICHIGAN.

DISH-WASHING MACHINE.

SPECIFIGATION forming part of Letters Patent No. 704,494, dated July 15, 1902. Application filed April 20, 1901. Renewed May 23, 1902. Serial No. 108,631. (No model.)

To It whom it may concern:

Be it known that I, CEPHAS W. ARNOT, a citizen of the United States, residing at Ypsilanti, in the county of Wayne, State of Michigan, have invented certain new and useful Improvements in Dish-l/Vashing Machines; and Ido declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to a dish-washing machine; and it consists in the construction and arrangement of parts hereinafter fully set forth, and pointed out particularly in the claims.

The objects of the invention are to produce amachine of the character described in which the arrangement is such as to enable the dishes to be quickly and thoroughly cleaned and in a manner to obviate breakage or injury thereto and a further arrangement whereby the cleansing-water may be driven forcibly upon the dishes from all sides by a force-pump, which operates to use the same water again and again in the process of washing the dishes and which is so constructed as to enable all parts thereof to be readily cleaned to obviate the accumulation of foul matter.

The above objects are attained by the mechanism illustrated in the accompanying drawings, in which Figure 1 is an elevation of a dish-washing apparatus involving my invention. Fig. 2 is a Vertical transverse section through the water receptacle and heater and the drainingtray, the pump located in the bottom of the heater and the stand-pipe and nozzle-arm connected therewith appearing in elevation. Fig. 3 is a plan View of Fig. 1 with the top or cover removed. Fig. 4 is a similar view with the draining-tray and the stand-pipe of the pump removed, showing a plan view of the pump at the bottom of the heater or exterior receptacle. Fig. 5 is an enlarged vertical section through the stand-pipe and pump as on line 5 5 of Fig. 4. Fig. 6 is a transverse section through the pump on line 6 G of Fig. 5. Fig. 7 is a transverse section through the nozzle-arm on line 7 7 of Fig. 5. Fig. 8 is an enlarged detail, partly in section, showing the manner of connecting the hollow stand-pipe with the pump. Fig. 9 is an elevation of one of the blades of the pump and the equalizing-spring, which is interposed between the lapping ends of the pump-blades.

Referringto the characters of reference, 1 designates the exterior receptacle of the washer, in which all the operative mechanism is located and which is provided wit-l1 a reduced bottom portion 2, adapted to contain Water,and in which the pump is seated. WVithin the receptacle or heater 1 is a crate or draining-tray 3, provided with a bottom 4, which inclines in opposite directions and has a circular opening 5 at the base of said inclines. The tray 3 is removably seated in the main receptacle 1 and is provided with suitable handles 6, whereby it may be removed.

The pump is located in the bottom 2 of the main receptacle and is eccentrically positioned therein. Said pump comprises a cylindrical case 7, closed bya removable top and bottom 8 and 9, respectively. WVithin the case or cylinder 7is a second annular case 10, eccentrically disposed therein and having aclosed top and an open bottom. The top of the cylinder of the pump is provided with a hollow vertically-extending stem 11, eccentrical thereto, and with a water-chamber 12, communicating with said stem. The wall 13, forming the bottom of the water-chamber 12, is provided with an eccentric aperture 14, which registers with the opening through the stem 11 and which is adapted to receive the boss 15, projecting from the top of the inner case 10 of the pump, said boss carrying a vertical bail 16,"which extends into the lower end of the stem 11, by which arrangement it will be seen that the inner case .10 of the pump is securely maintained eccentrically within the outer casing or cylinder 7 thereof. The pump-chamber 17 communicates with the waterchamber 12 in the top of the pump case or cylinder through the opening 18, (see Fig. 6,) formed through the mar, gin of the wall 13 at the top of the pump-cylinder and between the outer wall of said cylinder and the wall of the inner casing 10. The pump is of the rotary pattern, and the inner casing thereof is provided with laterally-projecting blades 19, which occupy a space crossing the diameter of the casing 10 and formed by the transverse partitions 20, which separate the opposite sides of said casing into independent air-chambers 21. The blades 19 project through the slotted openings in the wall of the casing 10 at their outer ends, while their inner ends overlap and are engaged by the hook-terminals 22 of a sinuous spring 23, whose tension is exerted to force the outer ends of the blades into terminal contact with the wall of the cylinder 7. At the same time said spring forms a yielding union between said paddles and while causing them to move together allows a slight independent movement of said paddles to enable them to adjust themselves to the varying position in which they are placed by the rotation of the inner casing 10, in which they are mounted. These paddles by the rotation of said inner casing are caused to successively sweep the pump-chamber 17 and drive before them the waterwhich fills said chamber, said water passing out through the discharge-opening 18 into the water-chamber 12 at the top of the pump-cylinder and thence into the stand-pipe 24, whose lower end is seated within the stem 11 of the pump-cylinder and communicates with the Water-cham ber 12. This stand-pipe has a row of vertical perforations through the wall thereof, from which the water is discharged in sprays as the pump is operated. At the top of the stand-pipe is a coupling 26, which screws into the upper end of said stand-pipe and is provided with a short vertical shaft 27, which passes through a sleeve 28 on the cover 29 and is provided with a protruding square end 30, adapted to receive a crank 31, through the medium of which said stand-pipe may be rotated. The coupling 26 is hollow, and it is provided with a short horizontal projecting portion carryingapin 32, through the medium of which a hollow nozzle-arm 33 may be connected to said coupling by a bayonet-lock 34. The end of the nozzleis provided with a removable plug 35 to permit cleaning when de. tached from said coupling. The nozzle 33 is provided with a series of apertures'36 along the opposite sides thereof and with a row of apertures 37 through the lower arc of said nozzle, whereby the water is thrown in jets laterally from the nozzle and downwardly therefrom.

The lowerend of the stand-pipe, which enters the hollow stem 11 0f the pump-cylinder, is provided with a vertical slot 38, (see Fig. 8,) which ,receives the bail 16, projecting from the inner casing of the pump carrying the blades or paddles, whereby a rotation of said stand-pipe through the medium of the crank 31 will rotate said inner casing of the pump and cause the blades or paddles to sweep the pump-chamber, thereby forcing the water therefrom into the water-chamber 12, the communicating stand-pipe 24, and the nozzle-arm 33, causing the water to pass in forcible streams from the apertures in said stand-pipe and nozzle and impinge upon the dishes arranged within the tray 3. The rotation of the stand-pipe and the nozzle concurrent with the operation of the pump distributes the water over the entire surface of the dishes within said tray as the stand-pipe is revolved, whereby the entire surface of the dishes is reached by the streams of water which are thrown from said revolving parts. It will be understood that the dishes remain stationary in the tray, thereby avoiding all liability of breakage, while the water is forced upon them from all directions by the revolving stand-pipe and nozzle.

As the inner casing of the pump is revolved the blades, which lie between and bear upon the antifriction-rollers 19, travel back and forth in the central way through said casing, owing to the eccentric position of the casing within the pump-cylinder, the blades being successively projected from and retracted within said casing as it revolves, while being held in terminal contact with the wall of the cylinder through the medium of the interposed spring 23.

Any required force may be given to the water projected from the stand-pipe and nozzle by increasing the movement of the pump through the medium of the crank 31. The position occupied by the pump within the lower portion 2 of the main receptacle causes it at all times to remain submerged in the water. As the pump is operated the water is drawn into the pump-cylinder through the perforations 39 in the wall of the cylinder, whereby the pump-chamber becomes filled with water in advance of the moving blades. The water after being discharged onto the dishes passes downward therethrough and enters the lower portion of the main receptacle through the aperture 5 in the bottom of the draining-tray, whereby the water used constantly returns to a point where it may be used again, requiring but a small amount of water in the operation of washing the dishes. It is designed to use water heated to a high temperature, and for that purpose, if desired, the main receptacle may be placed over the burner of the stove, so that the water in the bottom thereof may be heated directly. However, the water may be heated in a separate vessel and poured into the washer after the dishes have been placed therein. After the operation of washing the dishes has been completed the water used may be drawn from the washer through the discharge -pipe 40 and the rinsing-water poured over the dishes within the draining-tray, when by a few rotations of the crank said rinsing-Water may be projected over the dishes through the stand-pipe and nozzle, thoroughly rinsing them, after which they may be allowed to drain and dry by removing the cover 29. After the dishes have been rinsed they may be taken out of the washer by lifting the draining-tray therefrom, or they may be allowed to dry within the washer, as the steam from the rinsing-water instead of passing upward through the dishes in the tray is allowed to escape around the margin of said tray through the space 41 between it and the wall of the main receptacle.

It is essential in a pump of the character employed in this machine that it be so constructed as to enable it to be readily taken apart for cleaning, as the pump uses over and over again the water which has washed the food particles from the dishes, so that if the pump could not be readily cleaned in all its parts it would soon become foul from accumulated filth. The pumpherein shown is detachable in all its parts, as the top and bottom thereof are held in place to embrace the pump-cylinder by means of tie-rods 42, which are pivoted at etb and are adapted to swing upwardly, so that their upper ends will pass between the sides of the bifurcated brackets 44, projecting from the top. The upper ends of said rods are threaded and receive the nuts 45, which may be screwed down so as to engage said brackets and clamp the parts securely together, so as to render the pumpcylinderpractieally water-tight. Then it is desired to take the pump apart, said nuts are loosened so as to allow the tie-rods to be swung outwardly free from the bracket ll, when the top and bottom of the pump may be detached and the inner casing 10 removed from the pump-cylinder, when the paddles or blades may be withdrawn from said inner casing and all parts thoroughly cleaned.

It will be understood that the stand-pipe is removably seated in the stem 11 of the pumpcylinder and may be detached therefrom at will. It is of such exterior diameter, however, as to fill the stem of the cylinder closely, so as to prevent the passage of water from the chamber 12 except through the stand-pipe.

The chambers 21 in the inner casing of the pump are air-chambers, which do not become filled with the water as the pump is operated,

owing to the fact that said chambers are open only at the bottom and are air-tight, so that the water which surrounds said casingin the pump-chamber cannot enter said air-chambers to any extent.

In order to anchor the pump firmly in position in the bottom of the main receptacle, it is provided with fixed projections 46, extending laterally from the bottom thereof, which lie between the lugs 47 in the bottom of said receptacle and anchor the pump in position.

Within the tray 3 the dishes are maintained in place by any suitable mechanical means, as shown at $8 and 49, comprising the spring-retainers 48 on the bottom of the tray, adapted to hold cups and like articles, and the looped wire 49 around the wall of the tray, adapted to receive the edge of the plates and platters and support them so as to be exposed to the action of the water.

CD LJ Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a dislrwasliingdevice, the combination of a water-receptacle, a dish-containing tray, a traveling pipe, or nozzle, adapted to eject water upon the dishes in the tray and means connected with and operated by a movement of said pipe, or nozzle, for forcing water therethrough upon the dishes.

2. In a dish-washing apparatus, the combination of a water-receptacle, a tray for containing dishes, a rotary stand-pipe having a horizontal nozzle-arm and means for forcing the Water through said stand-pipe and nozzlearm operated by a rotation of said stand-pipe, whereby the water is distributed over the dishes as the stand-pipe is rotated.

3. In a dish-washing machine, the combination of a water-receptacle, a dish-containing tray located therein above the Water-line, a pump within the Water-receptacle, a traveling perforated nozzle, adapted to distribute the water over the dishes in said tray and means connect-ed with and actuated by a movement of said nozzle for operating said pump to force the water through said nozzle onto the dishes.

4. In a dish-washing machine, the combination of a water-receptacle, a pump in the bottom thereof, a'stand-pipe extending from said pump and passing vertically through the center of said receptacle, a removable tray surrounding said stand-pipe within said receptacle, said stand-pipe being rotary and conneeted with said pump for the operation thereof, a crank for rotating said stand-pipe to force the water from the pump therethrough and a perforated nozzle-arm projecting from said stand-pipe adapted to distribute the water upon the dishes in the tray.

5. In a dish-washing machine, the combination of a suitable receptacle havinga waterchamber in the bottom thereof and adapted to contain dishes above said water-chamber, a rotary stand-pipe having a horizontal nozzle-arm adapted to sweep the interior of the receptacle above the dishes, a pump connected with said stand-pipe whereby, by a rotation of said pipe the Water is forced through the stand-pipe and nozzle-arm.

6. In a dislrwashing machine, the combination of a dish-receptacle, a water-chamber, a suitable nozzle for spraying the dishes within said receptacle, a pump adapted to force water through said nozzle, said pump comprising a cylinder, an annular easing located eccen trically therein, lateral blades projecting from said casing and held yieldingly in terminal contact with the wall of the cylinder and means for rotating said casing within the pump-cylinder to drive the water therefrom into said nozzle.

7. In a dish-washing machine, the combination of a dish-receptacle, a water-chamber, a pump located in said water-chamber, a hollow shaft, or stand-pipe connected with the pumpcylinder and adapted to receive the Water therefrom as said shaft, or stand-pipe, is rotated to drive the pump, said pump 'compris ing a cylinder with a detachable top and bottom, a circular rotary casing located eccentrically within the cylinder and adapted to be attached to said stand-pipe, said casing having laterally-projectin g blades adapted to sweep the pump-chamber and held in terminal contact with the wall of the cylinder and a water-chamber in the top of the cylinder communicating with said stand-pipe and the cylinder of the pump.

8. In a device for the purpose set forth, the combination of a suitable receptacle adapted to contain dishes, a pump, a rotary stand-pipe and nozzle-arm connected with said pump, said stand-pipe being removably attached to the pump and having a detachable coupling at its upper end, the nozzle-arm being detachably attached to said coupling and having a removable plug in the outer end thereof.

9. In a device for the purpose setforth, the combination with a water-pipe or spraying apparatus, of a pump connected therewith, said pump comprising a cylinder having a removable top and bottom and provided with means for detachably clamping said parts together, a rotary case Within the pump-cylinder having blades,or paddles, adapted to work laterally therethrough and held by springpressure in terminal contact with the'wall of the cylinder.

10. In a device for the purpose set forth, the combination with a water-pipe, or sprayer, a pump communicating with said pipe, said pump comprising a cylinder having a closed top and bottom,a rotary case within the pumpcylinder, laterally-projecting blades within 

